--- /dev/null
+/*
+ This file is part of LilyPond, the GNU music typesetter.
+
+ Copyright (C) 2010--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
+
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "line-interface.hh"
+
+#include "stencil.hh"
+#include "grob.hh"
+
+LY_DEFINE (ly_line_interface__line, "ly:line-interface::line",
+ 5, 0, 0, (SCM grob, SCM startx, SCM starty, SCM endx, SCM endy),
+ "Make a line using layout information from grob @var{grob}.")
+{
+ LY_ASSERT_SMOB (Grob, grob, 1);
+
+ Grob *me = unsmob<Grob> (grob);
+
+ LY_ASSERT_TYPE (scm_is_number, startx, 2);
+ LY_ASSERT_TYPE (scm_is_number, starty, 3);
+ LY_ASSERT_TYPE (scm_is_number, endx, 4);
+ LY_ASSERT_TYPE (scm_is_number, endy, 5);
+
+ Offset from = Offset (scm_to_double (startx), scm_to_double (starty));
+ Offset to = Offset (scm_to_double (endx), scm_to_double (endy));
+
+ Stencil stil = Line_interface::line (me, from, to);
+
+ return stil.smobbed_copy ();
+}